Earth-boring sampler



'sept- 16, 1930 J. STEIGH EIT AL 1,776,166

EARTH BORING SAMPLER Filed May 31 1928 @Notant Patented Sept. 16, 1930 PATENT oPFicE JACOB STEIGH AND EARLI. CHOATE, OF LONG BEACH, CALIFORNIA EARTH-BORING SAMPLER Application led May 31, 1928. Serial No. 281,773.

rIlhis invention relates to an earth boring sampler.

The present invention constitutes an improvement of the construction disclosed in Letters Patent of the United States issued to us 011 January 26, 1926, for an improved earth boring sampler, No. 1,570,647.

The aim of the present invention is to provide a construction which is generally improved over that of our patent aforesaid, and

particularly provide a construction which will reduce the liability of the sampling tube to rotation to the minimum accordingly preventing damage to the core. Another object is to provide the improved construction with novel means for venting the tube and supplying the fluid to the cutter.

Additional objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment, and wherein:

Figure 1 is a view showing the tube and associated parts of a drilling rig,

Figure 2 is a sectional view taken on the line 2-2 of Figure 1, and

Figure 3 is a sectional view taken on the line 3 3 of Figure 1.

' Referring specifically to the drawings, the sampling tube is shown at 10 and consists of a tube open at its bottom and closed at its `upper end or top side from a vent valve as at 11, which is normally closed and may be of the construction disclosed at 4 in our patent aforesaid.

Screw threaded to the tube 10.at 10a and rising therefrom is a dome 12 of reduced diameter, into the interior of which the valve 11 extends and with which it communicates. Valve 11 is carried by a disk 11a screw threaded at 11b to the interior of dome 12. Said dome has vent ports 11 and laterally extending flangesat 13 which are engaged by flanges 14 and 14a of a channeled ring 15 fastened as at 16 within a casing 17. Elange 14a is removable in order that the parts may be assembled, and it is held in place by bolts 14". The casing 17 is adapted for rotation relative to the tube 10 and the latter is adapted to remain stationary as far as practical.

Such relative movement is rendered frictionless as far as practical by the provision of ball bearings as at 18 between the flanges 13 and 14.

At the lower end, the casing 17 is provided with a suitable cutter or cutting teeth 19.

At the upper end, an operating rod 2() may be detachably screwed as at 21. The operating rod is adapted to be turned from above in the usual manner to thereby impart rotation to the casing.

The rod 20 and casing 17 rotate about a water supply pipe 22 which extends axially thereof and through the top of the dome and into the latter, having outlet branches 23 fastened at 24 on the wall of the dome and adapted to discharge eXteriorly of the dome and into the interior of the casing. The water discharged into the interior of the casing is adapted to leave or escape downwardly between ythe sampling tube 10 and casing 17 to the cutters 19 and thence upwardly exteriorly of the casing to remove cuttings as usual.

Provided in the lower end of the sampling tube are sample-retaining lingers 25 which are of resilient metal and have their lower portions 26 welded or brazed within grooves 27 in the inner wall of such tube.

Under the action of the sample, the fingers 8 25 are displaced outwardly and completely into such grooves or slots 27 so that the sample may enter the tube and the fingers will not so interfere with the sample as to cause it to in turn cause the sampling tube to rotate with the casing. In other words, the structure is such that the sampling tube remains stationary practically all of the time and is not rotated when engaged by the sample so that damage to the core is accordingly prevented.

It will be understood that in the usual manner, as the cutter 19 is driven into the earth, it cuts out a core or sample which enters the tube 1() and can be removed therefrom for sampling or testing purposes. ,i

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

We claim as our invention An apparatus of the class described comprising a casing, a channeled ring therein providing anges, a sampling tube having a 5 dome thereon provided with flanges engaged by the first mentioned anges and on which ythe latter are adapted to rotate, a Water supply pipe extending axially of the casing and through the dome, a vent port in said ome,

and a vent valve in said tube opening into the dome.

In testimony whereof We ailix our signatures.

JACOB STEIGH. EARL F. CHOATE. 

